Page 39 - DGH_Annual_Report

India's Sedimentary Basins: Subsurface Insights 39

2.2.3 CAMBAY BASIN

Cambay is a Category I basin with commercial discovered in-place.
The area geographically overlaps with the state(s) of Gujarat, Rajasthan.

Source: DGH Internal Source: DGH Internal

The basin is characterized primarily by siliciclastic Miocene plays (Babaguru) are proved to be
rift-fill sediments, situated in the western region potential reservoirs of oil and gas in southern
of Indian peninsula. The basin is endowed with onland part of the basin and the offshore area
most matured petroleum provinces of India that extends into the Gulf of Cambay.
with major producing fields and 88% of total
hydrocarbons already discovered. Paleogene plays (Akholjuni, Gandhar) and
Mesozoic remain the key focus area of the basin.
The Cambay basin, though extensively exploited,
is still under active exploration for deep-seated • Hydrocarbon prospectivity and Basin
plays. Commercial hydrocarbon occurrences maturity:
are spread over different stratigraphic intervals In the basin, 7 plays exist within Basement,
ranging from the oldest sediments, including Paleocene, Eocene and Miocene. Petroleum
Deccan Trap volcanics of Cretaceous-Paleocene system was modelled in 3D basis adequate
to the youngest sediments of Miocene. Several datasets.
oil and gas fields have been discovered, out of
which two-third of the discoveries has been Onland sub-basin has a total hydrocarbon in-
made in Middle Eocene. place of 2,054 MMTOE. This includes discovered
in-place of 1,801 MMTOE and undiscovered risked
Cambay shale of Paleocene is the major source in-place of 253 MMTOE. The discovered in-place
rock charging Middle Eocene reservoirs of Kalol is under commercial production. The basin has
(North and Central) and Hazad (Southern) deltaic 12.3% of total in-place, potential to be explored
reservoirs with Tarapur (Oligocene) acting as and discovered.
the regional cap rock. During later exploration,